Keeping your balance while balancing a cylinder: two control ntechanisnts working together to reach the same goal.

Papegaaij, S. (2011) Keeping your balance while balancing a cylinder: two control ntechanisnts working together to reach the same goal. thesis, Human Movement Sciences.

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Abstract

The present study investigated whether central set of the initial postural responses can be influenced by the stability constraint of a voluntary manual task. A second aim was to examine the strategies used to accomplish a postural task and a voluntary task, and whether these strategies were controlled by the same mechanism. Twelve healthy older adults were perturbed during standing, while holding a tray with a cylinder placed with the flat side down (low constraint; LC) or with the rolling, round side down (high constraint; HC). Central set did change according to the task constraint, shown by a higher magnitude of both the GAS and T A muscle activation bursts in the HC condition. This increase in muscle activation was not reflected, however, in the CoP rate-of-rise or CoM displacement. The peak shoulder flexion, but not the peak hip flexion, was influenced by task constraint. However, the peak hip flexion. but not the peak shoulder flexion, was influenced by the initial condition. These results suggest separate control mechanisms. which do influence each other to reach the same goal.

Item Type:	Thesis (Thesis)
Supervisor name:	Smith, Beth A. PhD and Otten, Dr. Egbert and Horak, Dr. Fay B.
Faculty:	Medical Sciences
Date Deposited:	25 Jun 2020 10:39
Last Modified:	25 Jun 2020 10:39
URI:	https://umcg.studenttheses.ub.rug.nl/id/eprint/74

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